It was Warwickshire’s turn to collapse this afternoon in their sensational championship match against Nottinghamshire at Trent Bridge.

The Bears were all out for 152 in the last over before tea, leaving the home side a victory target of 300.

That looks a mountainous task on an unreliable track on which 30 wickets have fallen in the first five sessions.

Warwickshire resumed after lunch on 21 for one and Will Porterfield and Laurie Evans added 46 before there was a spectacular clump of wickets - four for 11 in 26 balls.

Evans, having gritted his way to 24, slashed Peter Siddle to gully where Michael Lumb held on at the second attempt. Ian Bell reached only five before nicking left-armer Harry Gurney.

Porterfield’s stout resistance (22, 59 balls) ended when he edged Siddle to first slip. Ateeq Javid edged a fine ball from Gurney to bag a pair.

As the ball jagged all over the place in the afternoon haze, it was left to Tim Ambrose (29, 33 balls) and Keith Barker (19, 30) to dig out some precious runs before a merry (except from a Notts point of view) last wicket stand of 32 between Jeetan Patel (20) and Oliver Hannon-Dalby (17 not out)

Nottinghamshire must make the biggest score of the match to win it.

And the Bears will be aghast if their seamers cannot close out victory on such a difficult batting wicket.